Harrow attachment for disk harrows



G. W. LOCKHART. HARROW ATTACHMENT FOR DISK HARROWS.

APPLICATION FILED JUNE 23. I916.

Patented Feb. 2 1, 1920.

of the invention being defined in the fol- UN TED STATES PATENT onm GEORGE w. LooKHAnT, or WELLINGTON, ILLINOIS.

minnow ATTACHMENT For, msKHAnRows.

To all whom it may concern Be it known that I, G-EoneE HAR a citizen of the United States, residing at WVellington, in the county of Iroquois and State of Illinois, have invented certaln new and useful: Improvements me Harrow'Attachments for Disk Harrows, of

which the following is a specification.

The disk harrows in connection 'with which my improvement'is intended'to be used commonly comprise a frame in which one or more pairsof shafts are pivotedin a" 1 line transverse tothe direction of movement" of the harrow, eachshaft carrying anumberofdisks for working the ground/ The shafts may be set at varying angles, though;

commonly where but a single'pair of disk shafts is employed they are set to incline inwardly and rearwardly so that the action of the disksin breaking up the groundalso has a tendency to feed the looseearthout wardly toward the ends of theharrowl -VVhere two sets of disks are employed ar-' ranged one in front of the other, thefront disk shafts are commonly inclined rear wardly and outwardly while the shafts ofthe rear pair are inclined as heretofore described, whereby theearth is; moved outward, and there is a tendency to forminore or less of a trough or depression along" the line traversed'by the center of the harrow. The disk shafts of such' harrows vary in length and moreover the effective width of the harrow is varied by varying the angle of inclination of'the disk shafts. There isa narrow band traversed by the center of" the harrow which is not reached by the disks on either side of the harrow, and which reouires- 'working, and furthermore there is a tendency to form a strip or ridge of coarser material at the outer ends of the series of disks.

It is the object of my invention to provide a tooth harrow attachment for disk harrows of the above description, which will act upon the ground in the immediate Specification of Letters Patent.

W. LooK-' Patented Feb. '24, 1920. Application filed June23, 1916. Serial No. 105,359; i

- lowing claim in which I have endeavored to distinguish it from the prior art so far Referringto'the drawingsFi gui-e 1 is a i plan of my harrow attachment, so much of shown as is necessary for an understandmg of the construction; Fig. 2 is a side elea-harrow disk to which it is attached being vation thereof, Fig; 3 a section on an en- 'larged 'scale on the line 33 .-of'Fig. 1 and Fig. 4c a SBCtlOIlOll the line 4 -4 of Fig. 3.

The same reference character is applied to each part wherever it appears in the sev- GlLlVlBWS; v r I In F igs. 1 and 2 the central beam of disk low, which is adapted to i-eceivemyattac ment, is shown 'at' 5, and the disks and diskshafts, or the rear set thereof,shown in dottedl'ines at 6, 6. The attachment comi I prisesa-mai1ibeam T which is formed of angle iron, as best seen' in Fig;-3,and one leaf 7 thereof is pierced by a longitudinal series of holes in which pins or teeth are secured. The pins are held in position by means of double clamps 10, (see Fig. 4)

there being one such clamp to each pair of pins, and said clamp consists of ashort strap-irontie or bar, the ends of which are bent into semi-circular form, as at ll, to engage the shafts of thepins, a bolt 12extending" through a perforation .13 'in the center of each clamp, and through an aperture 14 in the other leaf?" of the angle iron 1 whereby said pins-are firmly secured in position. fThefouter pins 8 on both sides of the center of the beam are of a common" length, but the intermediate pins 9 are somewhat longer so that they may be addiate strip is not worked by the disks ofthe main harrow body. At its ends the harrow beam 7 is provided with extensions 15,

which are of the same formation as the main beam and are also provided with harrow pins 8, the extensions being adjustable with reference'to the main beam by means of slots lfi foi'med in the beams and bolts 17" The harrow attachment isadjustably con-' '"nected to the beam of the disk harrow so 7 less deeply upon the soil as it is left by the that it may be caused to operate moreor disk harrow. For this purpose a bracket 18 a is bolted to-the rear end of the main beam of the disk harrow, and a hand lever 19 is pivoted thereto atv 20, said lever being 7 extended beyond its pivotal point into an '23, are adjustably bolted to the vmain beam 20 arm 21 which carries the harrow attachment, A-pair of slotted bracket plates 22,

of theharrow attachment, andan arm 2% is bolted to one of said brackets, and adjustably boltedat 25 to the end of the arm 21, a

series of holes 26 providing for suitable ad-- justment. A cross-brace 27 is bolted to the arm 2% and bracket 22 at 28, and to arm 21 at-29, so that the position of the harrow attachment relative to, arm 21 is fixed.

The bracket 18 carries an arcuate rack 30 con centric with the pivotalpoint 20 of the hand lever, and the pawl 31 mounted on the hand lever coeperates with the rack tomaintain the hand lever in ad usted POSItiOIIL In or- Rder to relieve the harrow attachment beam of strain it isfprovided with a pair of'attach-m ingf'lates 32, 32, near its opposite ends whic receive; hooks .33, 33, attached to chains 34, 34, by means of which instrumentalities the ends of the harrow attachment are adjustably connected to the disk bar-,-

row frame at anysuitable points, adjustment beingef'fected by the selection of the link which is directly attached to the frame My inventionprovides a tooth harrow, the

penetration of which, may be readily. ad-V,

justed, and thelength of which'may .bead-v justed to correspond to the effective length of the disk harrow to which it is adjusted,

and the teeth of the harrow may be adjusted r I the strip according to the depth and character of the trough formed by the disk harrow while the whole construction performs the function of the usual pin harrow without the necessity of using a separate device for this purpose; 7 J

I claim: U 7 ,1.,In a device of the class described, a transverse beam'carrying ground working devices, a bracket having an arcuate rackadapted tofbe attached 'to the frame of a disk harrow, a hand lever adjustably pivoted on said bracket and carrying said transverse beam and a pawl on said hand lever 00- operating with said rack. V r 2. In a device of the class described, a

transversebeam having ground working tools thereon, a bracket adaptedto be .at-

tached'tothe frame of a disk harrow and having-an arcuate rack thereon, a hand lever pivoted on said bracket and havingan arm 21 extending therefrom, a pawl on the'hand lever coeperating with the rack, an arm 2 L and brace 27 connected to arm said transverse beam.

3. Ina device of the class described, transverse beam having ground Working tools applied thereto, a bracket adapted to be attached to the frame of a disk harrow,

21 and to a hand lever 19 adjustably pivoted onthefl bracket and having an arm 21,-an arm 2%:

secured to the transverse beam at one end and adj ustably secured to the arm 21: at the other, and a brace 27 connecting said transverse beam and arm 21.?

4. In a device of the class described, a

transverse beam, a series of pins extending through said beam, a bracket vadapted to" be secured to the frame of the disk harrow, a hand lever pivotally mounted on the bracket, a rack on said bracket and a pawl on the hand-lever engaging the rack, an arm on, said lever connected' to the beam, and chains connected respectively to theroppo'site ends of the beam, and adapted to'be connected to the frame of the disk harrow.

GEORGE, w. LooKHART; 

